code: def test_concat(
      *,
      xs_n_input_dtypes_n_unique_idx,
      test_flags,
      backend_fw,
      fn_name,
      on_device,
  ):
      xs, input_dtypes, unique_idx = xs_n_input_dtypes_n_unique_idx
      helpers.test_function(
          input_dtypes=input_dtypes,
          test_flags=test_flags,
          backend_to_test=backend_fw,
          fn_name=fn_name,
          on_device=on_device,
          xs=xs,
          axis=unique_idx,
      )
  
imports: import numpy
  from hypothesis import strategies, assume
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_test
label_desc: Use image node_id 11 for calling a global function with example usage: test_concat() without return types